Calculating hull speed.

It wasn't USCG it was the abstract of title that the boat builder issues at the time of delivery.

When I do kick her up to WOT I blow black smoke. I don't think I like that.

SD

Talk to a prop shop the next time you haul out.

David

Just an added thought from the harsh teacher, experience. Talk to the prop shop before you haul out. find out the questions they will ask about top speed, rpm, temp, etc. Then you can run your boat find the exact answers which will allow the prop specialist to give you the best advice.

Skipper,

I went back in the photo album and found your boat pics on page 14. You're boat is not a full disp hull. It's not even a semi-disp hull. It's got a straight run aft w her chines parallel to the waterline. Only planing hulls have that feature. It may even have a very slight hook in the bottom. If it was a FD hull it would take about 40 hp to drive her at hull speed but as it's a planing hull it should require 80 to 100 hp. Actually I think your boat may be a Tollycraft. Every part of the shape of the hull looks Tolly to me. You say it's "tippy" without the stabs down and that's what they say about Tollys. They have flare all the way to the transom w that little knuckle 5" below the gun'nl that's in the the transom as well. Is there a Tolly in your area?

"I wouldn't pay any attention to the USCG tonnage. It is all based on a formula and has little relationship to the real world."

The CG tonnage is accurate , BUT, it measures volume not weight.

Sounds like someone has installed a cruising prop for you.

No need to ever see 2600rpm , only to go to full throttle , record what it is , and never operate higher than 300 below full throttle.

I would paint a red line on the tach at 300 down and simply enjoy the fuel savings . longer engine life and lower noise level.

nomadwilly wrote:
Skipper,

*Actually I think your boat may be a Tollycraft. Every part of the shape of the hull looks Tolly to me. You say it's "tippy" without the stabs down and that's what they say about Tollys. They have flare all the way to the transom w that little knuckle 5" below the gun'nl that's in the the transom as well. Is there a Tolly in your area?

Click to expand...

*Eric, I searched long and hard to find out Just where the hull cane from. One person from the Tollycraft web site told me that Tollycraft did not make a 32 ft hull but sdold a 28' mold to Glassply and Glassply built and sold bare hulls after streching the mold.

The carpenter who built the boat A Donald Jones of Tacoma Washington. Bought a hull and built the boat on it. This is all hearsay but you seem to validate the assumption. All is purley conjecture but you may be right on with your statement. Here are a few pics of the boat taken in 1992 for a survey done at the time. Other than the paravanes and the bilge keels it may be a Tolly hull. Don't know for sure.

Skipperdude,

Yes I see the pics. Still looks like a Tolly to me. And that ain't all bad as Tollycraft boats have a very strong following and are more efficient than their peers such as Uniflites*** ...mostly due to their narrower beam at the chines. Another efficiency issue for you could be weight. I see the bottom paint comes quite far up the topsides and I don't see it in the pics of the boat while underway. Mr Donald Jones may have built your boat a bit like my father had a lobster yacht built*** ....everything heavy duty to super heavy duty. The boat was so heavy it never did better than 9 knots w a 6-71 that had #80 injectors. I remember a farmer in Washington that built a home built aircraft but he used 2X4s instead of smaller Pisces of spruce. It never got off the ground. I see you've got a nice big rudder* ..very good. Does the marina facility there have a travel lift? Most of them (I think) have scales. Ask for a reading on the next lift. By the way the guy next to me in the harbor has a boat w a fuller bow and a bigger stern than yours. He has a DD 6-53 and tells me he runs the same speed as Willy but he's not concerned about economy as he runs his engine regularly at the dockside for hours. He also runs a sawmill and I think he's not happy unless he can hear big machinery running. I thought it had a very high idle speed but when a mechanic was there running his boat it was idling slower than I thought it could run.

She is kind of overbuilt. Mostly tractor parts such as huge ram cylinders for the steering and duel at that. Big rudder two hydraulic pumps one clutched the other a vickers constant for the steering. Not to mention the 3208.

SD

*

Well, whatever it is, it's a really neat boat.